15 men× 30 days = 450 Women’s 1-day work = 450/(30× 20) = ¾ work (8 Men + 12 Women)’s 1-day work = 8 +12× ¾ = 17 Days taken by 8 M and 12 women to finish the work = 450/17 days Alternate Method: 15 Men can do this job in 30 days and 30 women can do this job in 20 days It means 45 men or 60 woemn can do this job in = 10 days So 8 Men and 12 women can do this job in = 10/{8/45 + 12/60} = 10/ {8/45+ 1/5} = 10 /{17/45} = 450 /17
X and Y are independent normal variables with mean 50 and 80 respectively and standard deviation as 4 and 3 respectively. What is the distribution o...
To estimate the average work experience of MBA students at a management institute, five students are selected at random from each type of background, s...
If rp be partial correlation compound on sample rAB.c compound from sample of size n, the test statistic for significance testing is
For the following frequency distribution
Class : 3-5 5-7 7-9 ...
With reference to analysis of variance. which of the following statements is/are correct?
(I) Change of origin will affect the value of F
...Which of the following statements is INCORRECT?
Following two statements are related to regression coefficient
(I) Independent of the change of origin
(II) Independent of the change of scale
If Arithmetic mean and coefficient of variation of x are 10 and 40 respectively, then the variance of y = 10 – 2x is:
For the ANOVA table
the F - statistics is